diff --git a/package.json b/package.json
index 16ceeba..78bec03 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
   "devDependencies": {
     "eslint": "^2.4.0",
     "eslint-config-airbnb": "^6.1.0",
-    "mocha": "*",
+    "mocha": "2.5.0",
     "babel-eslint": "^6.0.0",
     "yeoman-assert": "^2.1.1",
     "yeoman-test": "^1.0.0"